diff --git a/docs/envvars.html b/docs/envvars.html
index 4eff7065df0..06aa0ac9369 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -232,7 +232,7 @@ See src/mesa/state_tracker/st_debug.c for other options.
 <li>LP_PERF - a comma-separated list of options to selectively no-op various
     parts of the driver.  See the source code for details.
 <li>LP_NUM_THREADS - an integer indicating how many threads to use for rendering.
-    Zero turns of threading completely.  The default value is the number of CPU
+    Zero turns off threading completely.  The default value is the number of CPU
     cores present.
 </ul>